import { Component, OnInit, Input, EventEmitter, Output } from '@angular/core';
import { DatasetService } from '../../../core/services/dataset/dataset.service';
import { DataTableRequest } from '../../../core/model/data-table/data-table-request';
import { DatasetCriteria } from '../../../core/query/dataset/dataset-criteria';
import { DatasetListingModel } from '../../../core/model/dataset/dataset-listing';
import { AuthService } from '../../../core/services/auth/auth.service';
import { RecentActivityType } from '../../../core/common/enum/recent-activity-type';
import { Router } from '@angular/router';
import { DmpStatus } from '../../../core/common/enum/dmp-status';
import { Principal } from '@app/core/model/auth/principal';
import { TranslateService } from '@ngx-translate/core';
import { debounceTime, takeUntil } from 'rxjs/operators';
import { ConfirmationDialogComponent } from '@common/modules/confirmation-dialog/confirmation-dialog.component';
import { DatasetCopyDialogueComponent } from '@app/ui/dataset/dataset-wizard/dataset-copy-dialogue/dataset-copy-dialogue.component';
import { FormControl, FormBuilder } from '@angular/forms';
import { BaseComponent } from '@common/base/base.component';
import { MatDialog } from '@angular/material/dialog';
import { DatasetWizardService } from '@app/core/services/dataset-wizard/dataset-wizard.service';
import { SnackBarNotificationLevel } from '@app/core/services/notification/ui-notification-service';
import * as FileSaver from 'file-saver';
import { EnumUtils } from '@app/core/services/utilities/enum-utils.service';
import { UiNotificationService } from '@app/core/services/notification/ui-notification-service';
import { DmpInvitationDialogComponent } from '@app/ui/dmp/invitation/dmp-invitation-dialog.component';
import { RecentActivityOrder } from '@app/core/common/enum/recent-activity-order';
import { Location } from '@angular/common';
import { Role } from '@app/core/common/enum/role';
import { LockService } from '@app/core/services/lock/lock.service';
import { MatomoService } from '@app/core/services/matomo/matomo-service';
import { HttpClient } from '@angular/common/http';

@Component({
	selector: 'app-drafts',
	templateUrl: './drafts.component.html',
	styleUrls: ['./drafts.component.css']
})
export class DraftsComponent extends BaseComponent implements OnInit {

	@Input() routerLink: string;
	@Output() totalCountDraftDatasets: EventEmitter<any> = new EventEmitter();

	datasetDrafts: DatasetListingModel[];
	datasetDraftsTypeEnum = RecentActivityType;
	status: number;

	totalCount: number;
	startIndex: number = 0;
	pageSize: number = 5;
	public formGroup = new FormBuilder().group({
		like: new FormControl(),
		order: new FormControl()
	});

	order = RecentActivityOrder;

	constructor(
		private router: Router,
		private datasetService: DatasetService,
		private authentication: AuthService,
		private language: TranslateService,
		public dialog: MatDialog,
		private datasetWizardService: DatasetWizardService,
		public enumUtils: EnumUtils,
		private uiNotificationService: UiNotificationService,
		private location: Location,
		private lockService: LockService,
		private httpClient: HttpClient,
		private matomoService: MatomoService
	) {
		super();
	}

	ngOnInit() {
		this.matomoService.trackPageView('Drafts');
		// const fields: Array<string> = [];
		// fields.push('-modified');
		this.formGroup.get('order').setValue(this.order.MODIFIED);
		const fields: Array<string> = [((this.formGroup.get('order').value === 'status') || (this.formGroup.get('order').value === 'label') ? '+' : "-") + this.formGroup.get('order').value];
		const dmpDataTableRequest: DataTableRequest<DatasetCriteria> = new DataTableRequest(0, 5, { fields: fields });
		dmpDataTableRequest.criteria = new DatasetCriteria();
		dmpDataTableRequest.criteria.status = DmpStatus.Draft;
		this.datasetService.getPaged(dmpDataTableRequest)
		.pipe(takeUntil(this._destroyed))
		.subscribe(response => {
			this.datasetDrafts = response.data;
			this.totalCount = response.totalCount;
			this.totalCountDraftDatasets.emit(this.datasetDrafts.length);
		});
		this.formGroup.get('like').valueChanges
			.pipe(takeUntil(this._destroyed), debounceTime(500))
			.subscribe(x => this.refresh());
		this.formGroup.get('order').valueChanges
			.pipe(takeUntil(this._destroyed))
			.subscribe(x => this.refresh());
	}

	redirect(id: string, type: RecentActivityType) {
		switch (type) {
			case RecentActivityType.Grant: {
				this.router.navigate(["grants/edit/" + id]);
				return;
			}
			case RecentActivityType.Dataset: {
				this.router.navigate(["datasets/edit/" + id]);
				return;
			}
			case RecentActivityType.Dmp: {
				this.router.navigate(["plans/edit/" + id]);
				return;
			}
			default:
				throw new Error("Unsupported Activity Type ");
		}
	}

	public isAuthenticated(): boolean {
		return !!this.authentication.current();
	}

	navigateToUrl() {
		if (!this.isAuthenticated()) { return; }
		this.router.navigate(['/datasets'], { queryParams: { status: 0 } });
	}

	roleDisplay(value: any) {
		const principal: Principal = this.authentication.current();
		let role: number;
		if (principal) {
			value.forEach(element => {
				if (principal.id === element.id) {
					role = element.role;
				}
			});
		}
		if (role === 0) {
			return this.language.instant('DMP-LISTING.OWNER');
		}
		else if (role === 1) {
			return this.language.instant('DMP-LISTING.MEMBER');
		}
		else {
			return this.language.instant('DMP-LISTING.OWNER');
		}
	}

	openDmpSearchDialogue(dataset: DatasetListingModel) {
		const formControl = new FormControl();
		const dialogRef = this.dialog.open(DatasetCopyDialogueComponent, {
			width: '500px',
			restoreFocus: false,
			data: {
				formControl: formControl,
				datasetId: dataset.id,
				datasetProfileId: dataset.profile.id,
				datasetProfileExist: false,
				confirmButton: this.language.instant('DATASET-WIZARD.DIALOGUE.COPY'),
				cancelButton: this.language.instant('DATASET-WIZARD.DIALOGUE.CANCEL')
			}
		});

		dialogRef.afterClosed().pipe(takeUntil(this._destroyed))
			.subscribe(result => {
				if (result && result.datasetProfileExist) {
					const newDmpId = result.formControl.value.id;
					this.router.navigate(['/datasets/copy/' + result.datasetId], { queryParams: { newDmpId: newDmpId } });
					// let url = this.router.createUrlTree(['/datasets/copy/', result.datasetId, { newDmpId: newDmpId } ]);
		      		// window.open(url.toString(), '_blank');
				}
			});
	}

	deleteClicked(id: string) {
		this.lockService.checkLockStatus(id).pipe(takeUntil(this._destroyed))
			.subscribe(lockStatus => {
				if (!lockStatus) {
					this.openDeleteDialog(id);
				} else {
					this.openLockedByUserDialog();
				}
			});
	}

	openDeleteDialog(id: string): void {
		const dialogRef = this.dialog.open(ConfirmationDialogComponent, {
			maxWidth: '300px',
			restoreFocus: false,
			data: {
				message: this.language.instant('GENERAL.CONFIRMATION-DIALOG.DELETE-ITEM'),
				confirmButton: this.language.instant('GENERAL.CONFIRMATION-DIALOG.ACTIONS.DELETE'),
				cancelButton: this.language.instant('GENERAL.CONFIRMATION-DIALOG.ACTIONS.CANCEL'),
				isDeleteConfirmation: true
			}
		});
		dialogRef.afterClosed().pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (result) {
				this.datasetWizardService.delete(id)
					.pipe(takeUntil(this._destroyed))
					.subscribe(
						complete => this.onDeleteCallbackSuccess(),
						error => this.onDeleteCallbackError(error)
					);
			}
		});
	}

	openLockedByUserDialog() {
		const dialogRef = this.dialog.open(ConfirmationDialogComponent, {
			maxWidth: '400px',
			restoreFocus: false,
			data: {
				message: this.language.instant('DATASET-WIZARD.ACTIONS.LOCK')
			}
		});
	}

	openShareDialog(dmpRowId: any, dmpRowName: any) {
		const dialogRef = this.dialog.open(DmpInvitationDialogComponent, {
			// height: '250px',
			// width: '700px',
			autoFocus: false,
			restoreFocus: false,
			data: {
				dmpId: dmpRowId,
				dmpName: dmpRowName
			}
		});
	}

	isUserOwner(activity: DatasetListingModel): boolean {
		const principal: Principal = this.authentication.current();
		if (principal) return !!activity.users.find(x => (x.role === Role.Owner) && (principal.id === x.id));
	}

	onCallbackSuccess(id?: String): void {
		this.uiNotificationService.snackBarNotification(this.language.instant('GENERAL.SNACK-BAR.SUCCESSFUL-UPDATE'), SnackBarNotificationLevel.Success);
		id ? this.router.navigate(['/reload']).then(() => { this.router.navigate(['/datasets', 'edit', id]); }) : this.router.navigate(['/datasets']);
	}

	onCallbackError(error: any) {
		// this.setErrorModel(error.error);
	}

	reloadPage(): void {
		const path = this.location.path();
		this.router.navigateByUrl('/reload', { skipLocationChange: true }).then(() => {
			this.router.navigate([path]);
		});
	}

	onDeleteCallbackSuccess(): void {
		this.uiNotificationService.snackBarNotification(this.language.instant('GENERAL.SNACK-BAR.SUCCESSFUL-DELETE'), SnackBarNotificationLevel.Success);
		this.reloadPage();
	}

	onDeleteCallbackError(error) {
		this.uiNotificationService.snackBarNotification(error.error.message ? error.error.message : this.language.instant('GENERAL.SNACK-BAR.UNSUCCESSFUL-DELETE'), SnackBarNotificationLevel.Error);
	}

	downloadPDF(dataset: DatasetListingModel): void {
		this.datasetWizardService.downloadPDF(dataset.id as string)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				const blob = new Blob([response.body], { type: 'application/pdf' });
				const filename = this.getFilenameFromContentDispositionHeader(response.headers.get('Content-Disposition'));

				FileSaver.saveAs(blob, filename);
				this.matomoService.trackDownload('datasets', "pdf", dataset.id);
			});
	}

	downloadDOCX(dataset: DatasetListingModel): void {
		this.datasetWizardService.downloadDOCX(dataset.id as string)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				const blob = new Blob([response.body], { type: 'application/msword' });
				const filename = this.getFilenameFromContentDispositionHeader(response.headers.get('Content-Disposition'));

				FileSaver.saveAs(blob, filename);
				this.matomoService.trackDownload('datasets', "docx", dataset.id);
			});

	}

	downloadXML(dataset: DatasetListingModel): void {
		this.datasetWizardService.downloadXML(dataset.id as string)
			.pipe(takeUntil(this._destroyed))
			.subscribe(response => {
				const blob = new Blob([response.body], { type: 'application/xml' });
				const filename = this.getFilenameFromContentDispositionHeader(response.headers.get('Content-Disposition'));

				FileSaver.saveAs(blob, filename);
				this.matomoService.trackDownload('datasets', "xml", dataset.id);
			});
	}

	getFilenameFromContentDispositionHeader(header: string): string {
		const regex: RegExp = new RegExp(/filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/g);

		const matches = header.match(regex);
		let filename: string;
		for (let i = 0; i < matches.length; i++) {
			const match = matches[i];
			if (match.includes('filename="')) {
				filename = match.substring(10, match.length - 1);
				break;
			} else if (match.includes('filename=')) {
				filename = match.substring(9);
				break;
			}
		}
		return filename;
	}

	refresh(): void {
		// const fields: Array<string> = [];
		// fields.push('-modified');
		const fields: Array<string> = [((this.formGroup.get('order').value === 'status') || (this.formGroup.get('order').value === 'label') ? '+' : "-") + this.formGroup.get('order').value];
		this.startIndex = 0;
		const dmpDataTableRequest: DataTableRequest<DatasetCriteria> = new DataTableRequest(0, 5, { fields: fields });
		dmpDataTableRequest.criteria = new DatasetCriteria();
		dmpDataTableRequest.criteria.status = DmpStatus.Draft;
		dmpDataTableRequest.criteria.like = this.formGroup.get("like").value;
		this.datasetService.getPaged(dmpDataTableRequest)
		.pipe(takeUntil(this._destroyed))
		.subscribe(response => {
			this.datasetDrafts = response.data;
			this.totalCount = response.totalCount;
			this.totalCountDraftDatasets.emit(this.datasetDrafts.length);
		});
	}

	public loadMore() {
		this.startIndex = this.startIndex + this.pageSize;
		// const fields: Array<string> = ["-modified"];
		const fields: Array<string> = [((this.formGroup.get('order').value === 'status') || (this.formGroup.get('order').value === 'label') ? '+' : "-") + this.formGroup.get('order').value];
		const request = new DataTableRequest<DatasetCriteria>(this.startIndex, this.pageSize, { fields: fields });
		request.criteria = new DatasetCriteria();
		request.criteria.status = DmpStatus.Draft;
		request.criteria.like = this.formGroup.get("like").value;;

		this.datasetService.getPaged(request).pipe(takeUntil(this._destroyed)).subscribe(result => {
			if (!result) { return []; }
			// this.datasetDrafts = this.datasetDrafts.concat(result.data);
			this.datasetDrafts = this.datasetDrafts.length > 0 ? this.mergeTwoSortedLists(this.datasetDrafts, result.data, this.formGroup.get('order').value) : result.data;
			this.totalCountDraftDatasets.emit(this.datasetDrafts.length);
		});
	}

	private mergeTwoSortedLists(arr1: DatasetListingModel[], arr2: DatasetListingModel[], order: string): DatasetListingModel[] {
		let merged = [];
		let index1 = 0;
		let index2 = 0;
		let current = 0;

		while (current < (arr1.length + arr2.length)) {

			let isArr1Depleted = index1 >= arr1.length;
			let isArr2Depleted = index2 >= arr2.length;

			if (order === 'modified') {
				if (!isArr1Depleted && (isArr2Depleted || (new Date(arr1[index1].modified) > new Date(arr2[index2].modified)))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'created') {
				if (!isArr1Depleted && (isArr2Depleted || (new Date(arr1[index1].created) > new Date(arr2[index2].created)))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'label') {
				if (!isArr1Depleted && (isArr2Depleted || (arr1[index1].label < arr2[index2].label))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			} else if (order === 'status') {
				if (!isArr1Depleted && (isArr2Depleted || (arr1[index1].status < arr2[index2].status))) {
					merged[current] = arr1[index1];
					index1++;
				} else {
					merged[current] = arr2[index2];
					index2++;
				}
			}
			current++;
		}
		return merged;
	}
}